A person who admires the hippies of the 1960's and 70's, but does not live a hippie lifestyle. Post hippies believe in the basic hippie principles; peace, liberalism, environmentalism, multiculturalism and free love. (and in some cases, vegetarianism)
However, post hippies denounce the 'New Age' beliefs of today's hippies, such as astrology.

Jimi: Hey, where's Bill?
Janis: He's at this anti-war protest.
Jimi: He's such a hippie.
Janis: Dude, he wears a suit and owns a gun store.
Jimi: Well, I guess he's more of a post hippie.